Plasma torch help conundrum....

[german8rcoupe]

Ok, I have two plasma cutters, both 3 phase. One is a Citoarc the other is a Murex Tredescut. Murex has been my main machine for years but consumables are now obsolete apparently.
The local welding supply place said with some re-wiring a new torch would be simple enough to chane.
Looking around at the types available there are very few showing the wiring connections required.
Mine both have 4 wires as opposed to two.....







Two from trigger plus two others one of which is a large earth.

Anyone suggest an easily replaced solution?

 

[Woody.v8]

I have a murex cut 20 and put a thermal arc sl90? i think, torch on it no problem, You just have to make sure what you want (hf start/pilot arc ect)

 

[Wedg1e]

That thick black wire... it doesn't carry HF up to the torch does it? It almost looks like a coaxial cable, but either way there's a good thickness of insulation on it.

 

[german8rcoupe]

The black wire on both torches goes back to the case of the machine.
Woody, how many wires was it? My machines both fire up at the start of a button as long as there is air pressure. What is the pilot arc?